/*
 * Copyright 2019 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.dmn.core.compiler;

import java.util.HashMap;
import java.util.Map;

import org.kie.dmn.api.core.DMNType;

public class DMNScope {

    private DMNScope parent;
    private Map<String, DMNType> variables = new HashMap<>(  );

    public DMNScope() {
    }

    public DMNScope(DMNScope parent ) {
        this.parent = parent;
    }

    public void setVariable( String name, DMNType type ) {
        this.variables.put( name, type );
    }

    public DMNType resolve( String name ) {
        DMNType type = this.variables.get( name );
        if( type == null && this.parent != null ) {
            return this.parent.resolve( name );
        }
        return type;
    }

    public Map<String, DMNType> getVariables() {
        return this.variables;
    }
}
